/// <summary>
/// 删除列
/// </summary>
/// <param name="tableName"></param>
/// <param name="fields"></param>
public void DelColumns(string tableName, TableField[] fields)
{
string strSQL = "ALTER TABLE " + tableName + " DROP ";
foreach (TableField tf in fields)
{
connector.Excute(strSQL + " column " + tf.Name);
}
connector.DelFieldMark(tableName, fields);
}